Harmonic Balancer
InfoVehicle Info Needed
ACDELCOPART NUMBER: 065-12684590

Harmonic Balancer

$9599
ShippingShips on 09/14/2026
Lowest PriceLowest Price Guarantee

Harmonic Balancer
  • Outside Diameter: 7.8 in.
  • Inside Diameter: 1.5 in.
  • Bolt And Washer Included: No
  • Center Bolt Length: 4.06 in.
  • Center Bolt Thread Diameter (in): 0.63 in.
  • Sold Individually

    ACDelco 12684590 Harmonic Balancer is designed as an application-specific service replacement that supports proper fit, function, and system integration. Supports dependable engine sealing, airflow, lubrication, valvetrain, or rotating-assembly operation as applicable. Verify vehicle fitment and system configuration before installation.

    ACDelco 12684590 Features:

    • Application-specific design helps maintain correct fit and function during engine service
    • Rotating drive-system service component for compatible applications

    ACDelco 12684590 Notes:

    • Verify vehicle application, position, and system configuration before installation.
  • Part TypeHarmonic Balancer
    BrandACDELCO
    Part CategoryReplacement Parts
    Product TypeHarmonic Balancer
    Programming RequiredNo
    Bolt And Washer IncludedNo
    Mounting Hole Quantity1
    Keyway TypeYes
    Center Bolt Thread Diameter (In)0.63
    Depth1.1
    Mounting Hole Diameter37.61
    Inside Diameter1.5
    Features & Benefits - Bullet 2GM Genuine Parts are designed, engineered and tested to rigorous standards, and are backed by General Motors.
    Features & Benefits - Bullet 3GM Engineers design and validate OE parts specifically for your Chevrolet, Buick, GMC, or Cadillac vehicle
    Features & Benefits - Bullet 4GM regularly updates production and service part designs to integrate new materials and technologies
    Product DescriptionGM Genuine Parts Engine Harmonic Balancer are designed, engineered, and tested to rigorous standards, and are backed by General Motors. GM Genuine Parts are the true OE parts installed during the production of or validated by General Motors for GM vehicles. Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE). &#9888;<b> WARNING:</b> Cancer and Reproductive Harm - www.P65Warnings.ca.gov
    Features &#38;#38; Benefits - Bullet 1Some GM Genuine Parts may have formerly appeared as ACDelco GM Original Equipment (OE)
    Center Bolt Thread TypeCoarse
    Width (In)8.38
    Center Bolt Thread Diameter (Mm)16
    Center Bolt Length103
    Height (In)6.25
    Drive Belt TypeSerpentine
    Length (In)9.12
    Part FitmentDirect Fit
    Outside Diameter198
    Pulley Groove Quantity13
    Weight (Lb)12.22
    Grade TypeOE
    Vendor Part Number12684590
    Package Qty1
    Package TypeEA
    No Questions
    No Reviews
    Some parts are not legal for use in California or other states with similar laws / regulations
    p65 warning
    Your Cart

    Your shopping cart is empty!